Skip to main content

Table 3 Result of exergy analysis day 1 (tomato)

From: Potential assessment and experimental analysis of solar vegetable dryer: in case of northern Ethiopia

Time (s)

\({\text{Ex}}_{\text{dco}}\)(kJ/kg)

\({\text{Ex}}_{\text{dci}}\)(kJ/kg)

\({\text{Ex}}_{\text{loss}}\)(kJ/kg)

\({\text{Ex}}_{\text{out}}\) (w)

\({\text{Ex}}_{\text{rad}}\) (w)

\(\eta_{{{\text{Ex}}.{\text{solar}}}}\) (%)

\(\eta_{{{\text{Ex}}.{\text{do}}}}\)(%)

\(\eta_{{{\text{Ex}}.{\text{net}}}}\) (%)

Ta (°C)

Tdco (°C)

Tdci (°C)

\(\bar{c}_{p}\)(kJ/kg)

0

0.165

0.237

0.072

234.74

56.4

24.5

34.5

36.1

1.0052

1.0052

3600

0.210

0.254

0.044

80.2

166.30

48.2

79.05

38.1

27.5

38.8

40

1.0054

1.0054

7200

0.296

0.434

0.138

125.4

209.80

59.7

53.35

31,8

27.6

41.1

44

1.0054

1.0055

10,800

1.073

1.120

0.047

152.7

248.80

61.4

95.6

58.7

30.1

53.8

56.8

1.0059

1.0060

14,400

0.864

1.071

0.207

104.2

173.40

60.1

76.04

45.7

30.2

53.6

56.4

1.0059

1.0060

18,000

0.720

0.336

0.084

183.3

234.74

78.1

88.30

68.9

30.1

49.8

50.1

1.0057

1.0058

21,600

0.717

0.785

0.068

311.8

324.80

95.9

90.52

86.8

28

49.2

50.2

1.0057

1.0057

25,200

1.240

1.355

0.115

200.1

273.67

73.1

90.72

66.3

28.7

56.8

58.2

1.0059

1.0060

28,800

0.870

0.957

0.087

110.5

199.5

55.4

90.00

49.8

28.8

52.2

53.4

1.0058

1.0058

32,400

0.365

0.463

0.098

167.8

224.8

74.6

73.13

54.5

27.1

42.1

45.8

1.0055

1.0056

36,000

0.279

0.188

0.091

112.4

207.7

54.1

67.40

36.5

27

40.1

42.3

1.0054

1.0055

39,600

0.220

0.286

0.066

82.68

191.77

43.2

70.00

30.2

26.8

38.4

40.1

1.0053

1.0054